Eur. Phys. J. Plus (2018) 133: 413
https://doi.org/10.1140/epjp/i2018-12211-y

Regular Article

Universal evolution of non-classical correlations due to collective spontaneous emission

¹ LPHE-Modeling and Simulation, Faculty of Sciences, University Mohammed V, Rabat, Morocco
² CeFEMA, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
³ University of Engineering and Technology, (RCET Campus), Lahore, Pakistan
⁴ Department of Physics, Faculty of Sciences-Ain Chock, University Hassan II, Casablanca, Morocco
⁵ Abdus Salam International Centre for Theoretical Physics, Miramare, Trieste, Italy
⁶ Centre of Physics and Mathematics, CPM, CNESTEN, Rabat, Morocco

^* e-mail: abdallahsalaoui1992@gmail.com

Received: 13 July 2018
Accepted: 22 August 2018
Published online: 12 October 2018

Abstract

We explore the spontaneous generation and decay of quantum correlations between two identical atoms coupled to a common Markovian environment in the presence of electromagnetic field modes. For this purpose, we analyze the dynamics of quantum correlations by employing the concurrence, the trace quantum discord and the local quantum uncertainty, for collective Dicke states. It is shown that the collective damping and dipole-dipole interaction plays a key role in enhancing non-classical correlations during the process of intrinsic decoherence. The quantum correlations can be maintained over a long time but for small distance between the two atoms.